Re: Steep Chute Design
Most important part of the design is to design the supports for the load at 100% plugged chute condition. Then you need to layout the design so that the flow is ideally at the speed of the belt when it loads onto the belt and at the appropriate angle to prevent bouncing off the belt. You may also need loading skirts depending on how it is loaded onto the belt. You must also be assured that it center loading onto the belt to prevent the belt from mistracking.
Other than that we do not have enough information to give you any more detail.
My company provides Bulk Flow Simulation Services (confirm your design before it is built) and we specialize in transfer chute design. If you are interested please contact me at the email below.
Gary Blenkhorn ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Simple Problem: Drastic Modification.
As drawn, your overflow will never reach the chute.
That detail aside: if you place the overflow on one side the material can overflow over another side. Why? Because the incomer must direct all material into the overflow to be any use. This means you will never get discharge from the bottom outlet since all material can pass the overflow. Feeding the bypass chute is extremely haphazard and you should rectify your level sensors instead. Most users have no trouble with level sensors, by the way. Get a better sparky and make the best of a poor chute design. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Re: Steep Chute Design
Hello,
Your hopper-chute arrangement is like water tank. Such arrangement with one overflow point will work for liquid.
If you provide about 6 overflow point at this level, it will approximate to above situation, with respect to repose angle of material. The cone surface will be wavy radially. Obviously 6 points are spaced at 60 degree pitch along periphery. However , arrangement as per sketch will still be non-workable, because there is no sufficient head room for material to form cone by repose angle, and the chute feed end is horizontal, instead of direct inclination by some 50 to 60 degree, as per material. Also how you will bring this material to outgoing conveyor.
The frequent flow problem you are facing is due to inadequate size of hopper, with respect to inflow and outflow fluctuations or cycle time. If you cannot change hopper, review operational / control philosophy for inflow and outflow.
Regards,
Ishwar G. Mulani
Author of Book : Engineering Science And Application Design For Belt Conveyors (new print November, 2012)
Author of Book : Belt Feeder Design And Hopper Bin Silo
Advisor / Consultant for Bulk Material Handling System & Issues.
Pune, India.
Tel.: 0091 (0)20 25871916
Email: conveyor.ishwar.mulani@gmail.com
Website: www.conveyor.ishwarmulani.com ■
Steep Chute Design
Steep chute design between hopper(side) and conveyor
Like in the drawing, I need to make an openning on the upper part of a hopper to 'overflow' pebble stones which is 15-80mm,my question is about the steep chute,the chute height is 20m, and horizontal travel is 10m,normally the stones go out from bottom opening of hopper and processed (crusher under hopper not shown) then send to conveyor.But sometimes when those level meters do not work well,it overflows and do not go through the bottom of the hopper and directly into the conveyor.what is your comment of the chute i am working on? I have some ideas but this is a field for me, I do not know what i have to look out in designing such kind of structure.
Two alternatives i am working on is 'ladders' style chute and a vertical pipe pattern. I am working to make both plan detailed . ■